The Gerald Shoenfeld is extremely small... you'll be able to see from anywhere. I bought an "obstructed view" seat and could see everything. Unfortunately Bridges isn't selling well, so you can probably move up if you are unhappy with your seat.
"The city seen from the Queensboro Bridge is always the city seen for the first time, in its first wild promise of all the mystery and the beauty in the world." - F. Scott Fitzgerald, The Great Gatsby